[ltt-dev] Test traces for LTTng

[Matthew Khouzam]

Hello world,
I am working in some test cases for LTTng/TMF and have several ideas, I 
would like to collect some comments from the real world before delving 
any further. The code I write in this will be released on the list of 
course.

Real world test cases.

The reference trace should have something that creates threads, has 
thread exits and renames (can't fiind the posix command for that one yet)
File access is a must.
So is a stream to a device, I will probably make an audio/network stream.
Mallocs/frees


Synthetic tests:
The thread must reach each of these states at least once.

Dead ( after a zombie?)

User Mode (?)

Syscall (printf?)

IRQ (?)

Trap (?)

Wait (Sleep/Wait for mutex?)

Unnamed (Spawn don't name yet?)

Wait fork (Spawn, is there a way to delay this?)

Wait Cpu (?)

Exit (Join?)

Zombie... grrrr... argh...
<Code>

#include<sys/wait.h>
#include<stdlib.h>
#include<unistd.h>

int  main(void)
{
         pid_t pids[10];
         int  i;

         for  (i=  9;  i>=  0;  --i)  {
                 pids[i]  =  fork();
                 if  (pids[i]  ==  0)  {
                         sleep(i+1);
                         _exit(0);
                 }
         }

         for  (i=  9;  i>=  0;  --i)
                 waitpid(pids[i],  NULL,  0);

         return  0;
}

</Code>

Soft IRQ (?)

Finally, the test should be as small as possible, preferably under 50k 
events on a single core system.

Any suggestions on how to reach all of these states?

Thank you,
Matthew